/* Copyright 2009 Requirements Management System 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.mags.remas.exception;

import java.io.InputStream;
import java.util.Properties;

import org.mags.exception.common.IExceptionMessageCreator;

/**
 * 
 * @author Mario Gaitan
 *
 */
public class MessageCreator implements IExceptionMessageCreator {
	private Properties properties;
	public Properties getProperties() {
		if(properties==null) {
			InputStream in=null;
			try {
				properties = new Properties();
			    in = getClass().getResourceAsStream("errors.properties");
			    properties.load(in);								
			} catch(Exception e) {
				properties = null;
			} finally {
				try {
					if(in!=null)
						in.close();
				} catch(Exception ex){/*IGNORE EXCEPTION*/}
			}
		}
		return properties;
	}
	private String getErrorMsg(String key) {
		String property = null;
		Properties properties = getProperties();
		if(properties==null)
			return null;
		try {
			property = properties.getProperty(key);			
		}catch(Exception ex){/*IGNORE EXCEPTION*/}
		return property;
	}	
	@Override
	public String createMessage(String key) {
		String errorCode = "error."+key;
		String errorMsg = null;		
		int dotPos = 0;
		do {
			errorMsg = getErrorMsg(errorCode);
			if(errorMsg==null) {
				dotPos = errorCode.lastIndexOf(".");
				if(dotPos>0)
					errorCode = errorCode.substring(0, dotPos);
				else
					errorCode = null;
			}
		} while(errorMsg==null&&errorCode!=null);
		return errorMsg;
	}
}
